Cementing machine for flexible material having a worktable and extended guide rolls



Sept. 15, 1953 w, QSGQQD 2,652,022

CEMENTING MACHINE FOR FLEXIBLE MATERIAL HAVING A WORKTABLE AND EXTENDED GUIDE ROLLS Filed April 17, 1951 INVENTOR WALTER E 056000 Patented Sept. 15, 1953 CEMENTING MACHINE FOR FLEXIBLE MA- TERIAL HAVING A WORKTABLE AND EX- TENDED GUIDE ROLLS Walter P. Osgood, Maiden, Mass., assignor to Boston Machine Works Company, Lynn, Mass., a corporation of Massachusetts Application April 17, 1951, Serial No. 221,454

2 Claims. (01. 118-250) This invention relates to improvements in cementing machines such as that described and illustrated in my application, Serial No. 155,543, filed April 12, 1950. The machine described in said application is designed to guide pieces of flexible material such as cloth or soft leather, which may be of irregular shapes, from a stationary work table to a rotating horizontal coating roll which dips into a pool of suitable liquid adhesive. The coated work pieces are effectively stripped from the roll by suitable means.

There are occasions when it is desirable to coat a portion only of the work piece. For example, it may be desirable in cementing a lining to a vamp piece for a shoe upper to coat only a portion of the vamp piece leaving the toe portion uncoated so that after the lining piece is stuck to the vamp piece, a toe stiffener can thereafter be inserted between the uncoated portions.

According to the present invention, the feed rolls by which the work pieces are conducted into proper contact with the coating roll are extended out beyond an end of the coating roll to accommodate the portion of the work piece which is not to be coated.

Another feature of the present invention is the provision of improved adjusting means for a blade or doctor which is mounted with its edge close to the ascending side of the coating roll so as to regulate the thickness of the film of liquid carried up from the pool on the surface of the roll to be applied to the work pieces which are brought into contact therewith.

For a more complete understanding of the invention, reference may be had to the following description thereof and to the drawing of which- Figure 1 is a rear elevational view of a portion of a cementing machine embodying the invention;

Figure 2 is a plan view of the same;

Figure 3 is a fragmentary sectional view of the same; and

Figure 4 is a fragmentary sectional plan view of a portion of the doctor blade and its adjusting means taken along the line 4-4 of Figure 3.

The cementing machine, portions of which are illustrated on the drawing, includes an open trough or reservoir to in which is mounted a horizontal coating roll l2. The roll is supported at one end by a fixed center element M, the other end being supported by a shaft l5 by which the roll may be rotated at constant speed so as to pick up a film of liquid cement from a pool I6 of such cement in the trough III. A pair of feed rolls 20 and 22 are supported by a suitable frame 24 above the coating roll I2 as indicated in Figure 3 and cooperate with the coating roll l2 to feed the work pieces through the machine. Adjacent to the front feed roll 20 is a horizontal work table 26 on which may be supported a work piece 28 which is to be put through the machine so as to have a coat of liquid cement applied to a face thereof. The machine illustrated is particularly adapted to coat pieces of flexible material such as soft thin leather, cloth or the like: which may have been cut into irregular shapes. as, for example, pieces of leather which are to be: assembled to form a shoe upper. The feed rolls 2B and 22 are preferably driven in the directions. indicated by the arrows in Figure 3 so that a. work piece will be fed and guided over the roll. 20 and under the roll 22, these rolls being near enough to each other and to the coating roll 12 for frictional feeding engagement with the Work piece. The work piece is stripped from the coating roll [2 by suitable stripping fingers 30 mounted against the rear side of this roll.

According to the present invention, provision is made for conveniently handling work pieces, a portion only of a face of which is to be coated, the remainder of the face being left uncoated. For example, a work piece 28 which is illustrated in Figure 2 may be shaped to form the vamp portion of a shoe upper. When coating the under face of this work piece, it may be desirable to apply coating to parts of the wing portions, leaving the rest of the piece uncoated. Thus, as far as the areas to be coated are concerned, there is a discontinuity in the engagement of the work piece with the coating roll. According to the present invention, this discontinuity does not result in an interruption in the feeding of the work piece through the machine as the feeding is continued by the engagement of the toe portion of the work piece with extended portions of the feed rolls 20 and 22. To guide the work pieces to the feed rolls, I provide a table 26 the width of which is about the same as the length of the coating roll. The feed rolls 20 and 22 are extended beyond the end of the coating roll 12, as indicated in Figure 1, so as to accommodate the portion of the work piece which is not to receive a film of cement and which therefore extends beyond the outer side edge of the table 26. This outer side edge of the table is preferably substantially aligned with the outer end of the coating roll l2 and thus serves as a convenient guide or indicator of the boundary between the art of the work piece which is to be coated and the part which is not.

of cement carried up from the pool 16 by the.

surface of the coating roll [2, a doctor blade 40 is mounted on the front side -of-the-troughlll so that its edge 42 is paralleland adjacent to the surface of the coating roll 2.

The doctor blade" 40 is secured to a lip or flangeau'ofthe trough by suitable bolts 46 which are threaded-through the blade and are received in notches 48 11113118.;

lip 44, wing nuts 50 being clamped to. the bolts.

Each blade 40 is provided with two lugsqfifl'orr its under face, one such lug-being indicated in Figures 3 and 4. Through .each lug is screw threaded a machine screw-54 having. a lock'nut 56 thereon, these screwstbeing offsetv from the plane of the-blade to abutvthe lip .44 of the. trough 10. An initial adjustment of the blade 40 is made by pushing the blade manually toward the roll l2 and adjusting the screws 54 in such a manner that the edge .42 of theblade has a minimum clearance from the surface of the roll I2. The nuts 56v are then set up tightly to. lock the screws 54 in such adjusted position. The blade cannot thereafter bepushed into contact with the surface of the roll-.12. since'the. screws 54- act as permanent stops, to-preVent such contact. If more clearance than the minimum is desired, this may be obtained by means of a second pair of adjusting screws 60 which .are threaded through the lugs 52, thus :being offset-from the plane of the blade ,so-asto engage the edge of the lip 44. Each adjusting screwlifiemay be provided with a knurled -head.,62. to: facilitate manual operation thereof. A :compression spring Eli-is preferably mounted between theihead 62 and the lug 52 so as to insure a frictional engagement between the screw 60- and thethreaded hole through the lug 52 so that incidentalrotation of the screw 60 will be prevented... By. turning the screw heads 62 in one direction, theblade 49 can bereadily adjusted away from the roll. 12:50 as toincrease 4 the clearance and thereby increase the thickness of the film of cement lifted from the pool by the coating roll. By turning the screws in the other direction, the blade can then be pushed closer to the roll, but the limit stop screws 54 preventactuaLcontact of the blade with the roll.

1. In a cementing machine which includes an open reservoir for liquid cement, a horizontal coating roll in said reservoir, and means for supporting and-rotating said roll; two horizontal feediiolls above said coating roll and in operative position-relativethereto, said feed rolls having substantially continuous extensions projecting a asubstantialrdistance beyond an end of said coatingiroll= and independent of said coating roll to guide portions .of work pieces which are not to becoated,m'eans"revolubly supporting said rolls, and a work table supported adjacent to said feed rolls.

2. In a cementing machine which includes an open reservoir for liquid cement'a horizontal coating rollin said reservoir, and means for supporting and rotating said roll; two feed rolls spaced above and near said coating roll and having circumferential grooves therein opposite the ends of the coating roll, said feed rolls having substantially continuous extensions projecting a substantial distance beyond an end of'said coating roll and independent 'of said coating roll to feed portions of work .pieceswhich are not to'be' coated, means revolubly supporting said feed rolls, and a work vtablehaving a width substantiallyequal to the length of the coating roll and meanssupporting said table with an edgefladjacent to said feed' rolls.

WALTER P. OSGOOD.

References Cited in the" file of this patent UNITEDSIIATES PATENTS Number 4 Name Date 771K362 Peck; Oct.- 4, 1904 1,810,223- Paterson June 16,1931 2,044,412 Weiertzet:al;' June 16, 1936 2,051,154 Scarnegie 'Aug. 18, 1936 2,480,786" Stein'hilber'; Aug. 30, 1949 2,574,942 Vital-1011 --Nov. 13, 1951 

